Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

No nonstop, and no clear pattern: the best connection reaches Dallas on time 85% of the time.

Best connections, one ticket

Ranked by chance you reach Dallas on time. Total trip = scheduled departure to arrival, layover included (Dallas is 1 h behind Dulles). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	IAD 06:00 → ATL 07:46DL 2127	2h 29m Atlanta	ATL 10:15 → DAL 11:24DL 1115	6h 24m	97%	85%
Delta Details →	IAD 08:27 → ATL 10:17DL 3080	3h 42m Atlanta	ATL 13:59 → DAL 15:03DL 512	7h 45m	98%	82%
Delta Details →	IAD 12:37 → ATL 14:34DL 1444	2h 04m Atlanta	ATL 16:38 → DAL 17:55DL 2780	6h 18m	94%	70%
Delta Details →	IAD 17:51 → ATL 19:54DL 1695	1h 21m Atlanta	ATL 21:15 → DAL 22:34DL 1104	5h 43m	83%	64%

Mixing airlines

One ticketMiss it and the airline rebooks you; bags go through. 45 min is enough.

Separate ticketsMiss it and you buy a new ticket. Re-check bags, clear security again: we require 90 min.


United UA 2739 IAD 08:15 → ATL Delta DL 512 ATL 13:59 → DAL Connection details →	3h 45m	7h 57m	98%	83%
United UA 1366 IAD 08:30 → BNA Southwest WN 5046 BNA 12:20 → DAL Connection details →	2h 51m	6h 45m	96%	81%
United UA 2031 IAD 06:30 → DEN Southwest WN 1518 DEN 10:05 → DAL Connection details →	1h 43m	7h 40m	100%	73%

Rank all connections, any airlines →

Regional partners count as the airline that sells them: SkyWest flying Delta Connection is one Delta ticket.

How these are worked out. Makes the connection: share of the last year’s flights where the first flight arrived with at least 45 minutes to spare (90 on separate tickets). Arrives on time: first flight not cancelled × connection made × second flight not cancelled and arriving within 15 minutes. Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.

About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON